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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Lateral view of a Male Baetidae (Blue-Winged Olive) Mayfly Dun from Mystery Creek #308 in Washington
This dun emerged from a mature nymph on my desk. Unfortunately its wings didn't perfectly dry out.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Ephemerella aurivillii Mayfly Nymph Pictures

I have collected this species in Montana but it is very common in Alaska streams.

This mayfly was collected from the Kwethluk River in Alaska on June 19th, 2010 and added to Troutnut.com by Bnewell on June 26th, 2011.


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Ephemerella aurivillii Mayfly Nymph Pictures

Collection details
Location: Kwethluk River, Alaska
Date: June 19th, 2010
Added to site: June 26th, 2011
Author: Bnewell
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